i == 6
while i > 0:   
    print("*/n"*i)
    i= i-1

s = "大家好我是陆九愚"
a = 3
b = [s,a,a-1]
b[0:2] = []
print(b)

a = {'one':1,'two':2,'three':3}
b = dict(one=1,two=2,three=3)
c = dict(zip(['one','two','three'],[1,2,3]))
d = dict([("one",1),('two',2),('three',3)])
e = dict({'one':1,'two':2,'three':3})
print(a,b,c,d,e)

s1 = '%3s上次数学考试成绩%5d,本次%3d,成绩提高%.3f'%('陆九愚',100,150,0.5)
print(s1)

i1,i2 = 20,3
print('%.2f'%(i1/i2))
print(i1//i2)

x,y = 15,[15,3,4,5]
print(x in y)
x = 10
print(x in y)
print(x is y)

a = eval(input("请输入一个公式:"))
print(a)

score = eval(input("请输入成绩（0-100）："))
if score > 60:
    pass
else:
    print("你不及格")

for i in list(range(1,10,2)):
    print(i)
sum = 0
for i in range(1,15):
    sum += i
print(sum)

for n in range(2,101):
    m = int(n**0.5)
    i = 2
    while i<=m:
        if n%i == 0:
            break
        i+=1
    if i>m:
        print(n,end=" ")

n = eval(input("请输入大于一的一个整数："))
m = int(n**0.5)
for i in range(2,m+1):
    if n%i == 0:
        break
else:
    print("%d是素数"%n)

sum = 0
while True:
    n = eval(input("请输入一个整数："))
    if n == 0:
        break
    if n%3 != 0:
        continue
    sum += n
print("所有3的倍数的整数之和为%d"%sum)